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Application - Aquaculture

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Aquaculture  

The health of fish is directly dependent on water quality — so analysis is a must. It also helps to conserve resources, by determining the correct amount of feed for example.

Fish

Aquaculture, is one of the fastest growing food-producing sector. It is responsible for providing 50% of the global supply for the fish we eat. Hence, proper management of aquaculture water quality plays a significant role for the success of aquaculture operations.

There are several key water quality parameters that can each directly affect animals’ health. However, in the complex dynamic aquaculture environment, water quality parameters also influence each other. Thus, maintaining balance in water quality parameters is fundamental for the health and growth of culture organisms.

The use of the latest technology is absolutely essential for modern fish farms if they are to achieve high yields and stay competitive. That is why more and more businesses are relying on aeration with pure oxygen in conjunction with automated feeding systems. For automated feeding systems, feeding is regulated according to the water temperature, oxygen content and carbon dioxide content as well as the turbidity. This prevents overfeeding and hence increased pollution of the tank.

At the same time, however, monitoring these automated systems demands sophisticated measurement technology with reliable, self-monitoring sensors.

HACH offers lab, portable and online measurement tools for the following parameters:

  • Ammonium
  • Oxygen (LDO)
  • Turbidity
  • pH
  • Nitrate
  • Phosphate

Alongside automated systems, routine monitoring of the water quality is very important also. Many of the substances contained in water are harmful to fish, including nitrate, phosphate, ammonium, nitrite and also heavy metals such as copper. Intermittent monitoring, using mobile systems in some cases, and photometric testing is therefore advisable.

If fish are transported over long distances, the water quality in the transport tanks also has to be monitored. The oxygen and ammonium concentration is particularly important here.

Monitoring and instruments by parameters  

Parameters

Why measure?

Hach Online Analyzers

Hach Lab Products

Dissolved Oxygen

Direct influence on feed intake, disease resistance and metabolism.

LDO2

LDO for HQd

pH

Affects physiological processes of culture organisms

Digital Differential pH Sensors

PHC for HQd

Ammonia

Excessive feeding and waste

Amtax sc

AISE

DR900, DR1900, DR3900

NH3ISE for HQd

BOD

Oxygen demand by aerobic bacteria to break down organic material

LBOD for HQd

ORP

Monitor of oxidative environment

Digital Differential ORP Sensors

MTC for HQd

Turbidity

Phytoplankton and clay particles

Affects dissolve oxygen

Ultraturb sc

1720E

2100Q

2100N/AN

Conductivity/Salinity

Osmoregulation of body minerals

Inductive Conductivity Sensor

CDC for HQd

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